Impeoved



@uiten tant gatmt @Hite WILLIAM e. LONG ANL yHARVEY A. LOWNSBERY, 0FLoeKPoR'r, NEW YORK.

Letters Patent No. 81,386, dated August 25, 1868.`

IMPROVBDHLTBR.

TO ALL WHOM I'l MAY CONCERN: y

Be it known that we, WILLIAM C. LONG and HARVEY A. LOWNSISERY, ofLockport, in the county of Niagara, and State of New York, haveinventeda certain new and useful Improvement in submerged Filters; andwe'do .hereby declare thatl the following is a full and exactdescription thereof', reference being had tothe accom.

panying drawings, making part of this speeication.

Figure 1 is a longitudinal section of our improved filter.

Figure 2, across-section, showing the filter in perspective.

Like letters of reference indicate corresponding parts in both figures.l

`Our invention consists in combining, with a submerged filter made ofgalvanized iron, two Yor more crossdiaphragmm'giving a zigzag passage ofthe water through the filtering-media, and longitudinal ribs in thewaterchamber, which serve to stifen and stay the filter as it is handledby the pipo.

In thedrawings, A indicates the lter, which is made of rectangular or'square form, and of galvanized iron, which prevents oxidation andtainting of the water.

This filter is` divided, by perforated partition b, into twocoinpartments,.B C, the first forming the filteringchamber, (beingfilled with packingfor the purpose,) and the last forming the reservoiror supply-chamber, for holding the purified water.A y The watervisadmitted from' the outside, through the perforated plates a b, passingthrough the packing, and

itis drawn from the reservoir by water-pipe D, extending through to nearthe bottom, and attached'in any.l

Suitable manner.'

A small pipe, E, allows free passage of' the air.

In the packingchamber, we locate two or more diaphragme, del, atsuitable distances apart, leaving' paseagesfwhich'alternate in position,as shown. The object of this is to give a zigzag or indirect current ofthe water through the filtering-media, thereby not only producing abetter effect by the long passage, but, lby a direction that-isvertical, affording abetter chance'ior the deposition of' the particlesof impure matter. By

`this means, the filteringninpediav may be made comparatively thin, andthe whole surface ef the plates a b may be' filled with holes.' p l Theinterior' of the water-chamber is provided at top and bottom withlongitudinal ribs g g, at suitable distance apart, as clearly shown, thcpurpose oi' which is to strengthen the box at the points where thegreatest strain cornes in handling thellilter bythe water-pipe. Thiseifectually prevents any bulging action, and also obviates collapsefromcompression ofthe water. Il desirable, the sides and ends may bearranged in a similar manner. l

This filter, constructed of galvanized iron,.and thus arranged, can beeasily handled, and inserted at any desired depth underwater, and a purearticledrawn therefrom. u

What we claim as our invention, anddesire to secure by Letters Patent,is

The arrangement, in connection witl1.r.he galvanized-iron tilter'A, ofthe diaphragms a. b, dividing the packing-chamber,fand the ribsgg,strengthening the water-chamber, the whole operating in the manner andfor the purpose Specified. v I

In witness whereof, we have hereunto signed our naines in the presenceoi two subscribing witnesses.

' WM. C. LONG,

' HARVEY A. LOWNSBERY.

Witnesses:

'.l. A` GAssAwAr, i WILLIAM Anennn.

